Results 21 to 30 of about 4,152 (114)

Local model of a qubit in the interferometric setup

open access: yesNew Journal of Physics, 2015
We consider a typical realization of a qubit as a single particle in two-path interferometric circuits built from phase shifters, beam splitters and detectors. This framework is often taken as a standard example illustrating various paradoxes and quantum
Pawel Blasiak
doaj   +1 more source

Feynman's Path Integrals and Bohm's Particle Paths [PDF]

open access: yes, 2005
Both Bohmian mechanics, a version of quantum mechanics with trajectories, and Feynman's path integral formalism have something to do with particle paths in space and time. The question thus arises how the two ideas relate to each other.
Albeverio S A   +5 more
core   +3 more sources

Loss of coherence in double-slit diffraction experiments [PDF]

open access: yes, 2016
7 págs.; 3 figs.; PACS numberssd: 03.65.Yz, 03.65.Ta, 03.75.DgThe effects of incoherence and decoherence in a double-slit experiment are studied using both optical and quantum-phenomenological models.
Bastiaans, M. J.   +2 more
core   +1 more source

Mutually unbiased measurements in finite dimensions

open access: yesNew Journal of Physics, 2014
We generalize the concept of mutually unbiased bases (MUB) to measurements which are not necessarily described by rank one projectors. As such, these measurements can be a useful tool to study the long-standing problem of the existence of MUB.
Amir Kalev, Gilad Gour
doaj   +1 more source

Reconfigurable topological waveguide based on honeycomb lattice of dielectric cuboids

open access: yesNanophotonics, Volume 9, Issue 10, Page 3451-3458, June 2018., 2018
Abstract We show that the photonic crystal (PhC) made of dielectric cuboids with their centers forming a honeycomb lattice is characterized by a ℤ2 topological index when the longer sides of six cuboids point towards the center of hexagonal unit cell.
Xing‐Xiang Wang, Xiao Hu
wiley   +1 more source

Operational discord measure for Gaussian states with Gaussian measurements

open access: yesNew Journal of Physics, 2015
We introduce an operational discord-type measure for quantifying nonclassical correlations in bipartite Gaussian states based on using Gaussian measurements. We refer to this measure as operational Gaussian discord (OGD).
Saleh Rahimi-Keshari   +2 more
doaj   +1 more source

Deriving robust noncontextuality inequalities from algebraic proofs of the Kochen–Specker theorem: the Peres–Mermin square

open access: yesNew Journal of Physics, 2017
When a measurement is compatible with each of two other measurements that are incompatible with one another, these define distinct contexts for the given measurement. The Kochen–Specker theorem rules out models of quantum theory that satisfy a particular
Anirudh Krishna   +2 more
doaj   +1 more source

Branched Hamiltonians and Supersymmetry

open access: yes, 2013
Some examples of branched Hamiltonians are explored both classically and in the context of quantum mechanics, as recently advocated by Shapere and Wilczek. These are in fact cases of switchback potentials, albeit in momentum space, as previously analyzed
Curtright, Thomas L, Zachos, Cosmas K
core   +1 more source

Effect of Methyl Jasmonate on Phytoalexins Biosynthesis and Induced Disease Resistance to Fusarium oxysporum f. sp. Vasinfectum in Cotton (Gossypium hirsutum L.)

open access: yesInternational Journal of Agronomy, Volume 2014, Issue 1, 2014., 2014
The effect of methyl jasmonate (MeJA) sprayed on cotton healthy leaves was evaluated in terms of inherent bioactive chemicals induction. The total phenolic content significantly increased after MeJA 5.0 mM treatments compared to the other tested concentrations (0; 2.5; 10; 15; 20 mM).
Yao Kouakou François Konan   +8 more
wiley   +1 more source

Dynamical decoupling leads to improved scaling in noisy quantum metrology

open access: yesNew Journal of Physics, 2016
We consider the usage of dynamical decoupling in quantum metrology, where the joint evolution of system plus environment is described by a Hamiltonian. We show that by ultra-fast unitary control operations acting locally only on system qubits, noise can ...
Pavel Sekatski   +2 more
doaj   +1 more source

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